From e26fcda5d8cdad7682cf23c866fc52135e00f67c Mon Sep 17 00:00:00 2001
From: Cody Henthorne <cody@signal.org>
Date: Mon, 24 Aug 2026 11:16:20 -0400
Subject: [PATCH] Prevent server rejection of group updates.

---
 .../org/thoughtcrime/securesms/groups/GroupManagerV2.java     | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManagerV2.java b/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManagerV2.java
index 8d2c937dd9..41bb63ef2c 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManagerV2.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/groups/GroupManagerV2.java
@@ -11,7 +11,6 @@ import org.signal.core.models.ServiceId;
 import org.signal.core.models.ServiceId.ACI;
 import org.signal.core.models.ServiceId.PNI;
 import org.signal.core.util.StreamUtil;
-import org.signal.core.util.UuidUtil;
 import org.signal.core.util.logging.Log;
 import org.signal.libsignal.zkgroup.InvalidInputException;
 import org.signal.libsignal.zkgroup.VerificationFailedException;
@@ -670,7 +669,6 @@ final class GroupManagerV2 {
         throws GroupChangeFailedException, GroupNotAMemberException, GroupInsufficientRightsException, IOException
     {
       boolean refetchedAddMemberCredentials = false;
-      change.sourceUserId(UuidUtil.toByteString(authServiceId.getRawUuid()));
 
       for (int attempt = 0; attempt < 5; attempt++) {
         try {
@@ -1214,8 +1212,6 @@ final class GroupManagerV2 {
       GroupChange.Actions.Builder change = requestToJoin ? groupOperations.createGroupJoinRequest(expiringProfileKeyCredential)
                                                          : groupOperations.createGroupJoinDirect(expiringProfileKeyCredential);
 
-      change.sourceUserId(selfAci.toByteString());
-
       return commitJoinChangeWithConflictResolution(currentRevision, change);
     }